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A firewall is used to protect a networked [[server]] from damage by those who log in to it. This can either be a computer equipped with [[security]] features, [[software]] protection (called defensive coding), or both. A firewall allows only certain messages from the [[Internet]] to flow in and out of the internal network. So, basically, it's a lot like a wall of fire. Whatever.
Note: What many homeusers call a FireWall is actually just an IDS ([[IntrusionDetectionSystem]]) or a so called "Personal Firewall".▼
Like for example the popular [[Windows]] tools [[ZoneAlarm]] and [[BlackIceDefender]].▼
* http://www.firewall-net.com/en/▼
A real firewall is a piece of [[hardware]] independent of the system that is to be protected.▼
* http://www.linux-firewall-tools.com/linux/▼
For [[Linux]] you should look into [[iptables]].▼
* http://www.tldp.org/HOWTO/Firewall-HOWTO.html▼
▲* http://www.firewall-net.com/en/
▲Note: What many homeusers call a FireWall is actually just an IDS ([[IntrusionDetectionSystem]]) or a so called "Personal Firewall".
▲* http://www.linux-firewall-tools.com/linux/
▲Like for example the popular [[Windows]] tools [[ZoneAlarm]] and [[BlackIceDefender]].
▲* http://www.tldp.org/HOWTO/Firewall-HOWTO.html
▲A real firewall is a piece of [[hardware]] independent of the system that is to be protected.
▲For [[Linux]] you should look into [[iptables]].
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Revision as of 22:25, 7 February 2005
A firewall is used to protect a networked server from damage by those who log in to it. This can either be a computer equipped with security features, software protection (called defensive coding), or both. A firewall allows only certain messages from the Internet to flow in and out of the internal network. So, basically, it's a lot like a wall of fire. Whatever.
Note: What many homeusers call a FireWall is actually just an IDS (IntrusionDetectionSystem) or a so called "Personal Firewall".
Like for example the popular Windows tools ZoneAlarm and BlackIceDefender.
A real firewall is a piece of hardware independent of the system that is to be protected.
For Linux you should look into iptables.